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The Color Glass Condensate and High Energy Scattering in QCD
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At very high energies or small values of Bjorken x, the density of partons, per unit transverse area, in hadronic wavefunctions becomes very large leading to a saturation of partonic distributions. When the scale corresponding to the density per unit transverse area, the saturation scale Q_s, becomes large (Q_s\gg \Lambda_{QCD}), the coupling constant becomes weak (\alpha_S(Q_s)\ll 1) which suggests that the high energy limit of QCD may be studied using weak coupling techniques. This simple idea can be formalized in an effective theory, the Color Glass Condensate (CGC), which describes the behavior of the small x components of the hadronic wavefunction in QCD. The Green functions of the theory satisfy Wilsonian renormalization group equations which reduce to the standard linear QCD evolution equations in the limit of low parton densities. The effective theory has a rich structure that has been explored using analytical and numerical techniques. The CGC can be applied to study a wide range of high energy scattering experiments from Deep Inelastic Scattering at HERA and the proposed Electron Ion Collider (EIC) to proton/deuterium-nucleus and nucleus-nucleus experiments at the RHIC and LHC colliders.
Forward citations
Cited by 38 Pith papers
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Gluonic nucleon energy correlators and fracture functions for Color Glass Condensate
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Energy-Flow Moments for Elliptic Gluon Wigner Tomography
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TMD factorization in diffractive heavy-quark production in photon-nucleus collisions
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Matching collinear factorization with color-glass condensate for inclusive and exclusive deep inelastic scattering
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Unpolarized GPDs at small $x$ and non-zero skewness
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Diffractive deep inelastic scattering in the dipole picture: the $q\bar{q}g$ contribution in exact kinematics
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Parton distributions in the shockwave formalism
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Single spin asymmetry in forward $pA$ collisions from Pomeron-Odderon interference
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Improvement for Color Glass Condensate factorization: single hadron production in pA collisions at next-to-leading order
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Unbiased Data-Driven Determination of the Nuclear Dipole Amplitude in the Color Glass Condensate
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Factorization of elastic, single, and double diffractive $pp$ scattering
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Gluon GTMD at strong coupling: fixed-spin saddle factorization and Reggeization
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Azimuthal decorrelation in diffractive dijet production
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Physics-Informed Global Extraction of the Universal Small-$x$ Dipole Amplitude
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Exclusive $\mathrm{J}/\psi$ production off a dilute proton within a refined hotspot description
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Regge trajectories, detectors, and distributions in the critical ${\rm O}(N)$ model
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Initial condition for the Balitsky-Kovchegov equation at next-to-leading order
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Melting of $c \bar c$ and $b \bar b$ pairs in the pre-equilibrium stage of proton-nucleus collisions at the Large Hadron Collider
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Simple Scaling Laws for Energy Correlators in Nuclear Matter
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Energy dependence of the deformed nuclear structure at small-$x$
JIMWLK evolution slowly drives uranium and ruthenium nuclei toward a more spherical shape, with the effect growing for smaller nuclei.
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Finite-size effects on small-$x$ evolution and saturation in proton and nuclear targets
Including the proton's finite transverse size in small-x evolution weakens saturation effects compared with impact-parameter-averaged treatments, while lead-target predictions are insensitive to scheme choices once fi...
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Quasi-Classical Evaluation of Gluon Saturation Induced Helicity Effects
A saturation-induced helicity-dependent A+ gluon field contributes at order Qs^6 to the two-particle dijet correlation and further suppresses the back-to-back peak in polarized e-A collisions.
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Collinearly Improved Balitsky-Kovchegov Evolution of the Gluon Wigner Distribution
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Revisiting the role of saturation in diffractive vector meson production
EMD-corrected LHC data enables a consistent CGC description of coherent and incoherent diffractive J/ψ production in γ+p and γ+Pb via Bayesian inference from combined HERA and LHC measurements.
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Maximum phase-space density of linearly polarized gluon TMDs in the saturation region
For the dipole gluon TMD, the Sudakov-limited maximum phase-space density of h_1^{⊥g} is 2 n_g^{max} ∼ 2 α_s^{-3/2} in the saturation region.
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Medium Characterization with Hard Probes: From Cherenkov Light in QED to Jet Drift in QCD
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Forward hadron production in pp collisions at LHC energies from an event generator based on the color glass condensate framework
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PDF at small $x$ in the non-perturbative region
A branching parton model with fixed splitting probability w gives xf(x)∼x^{-δ}, δ=ln(2w)/ln2, and, if an ad hoc freeze is imposed, a saturated parton density at very small x.
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Entropy from decoherence: a case study using glasma-based occupation numbers
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QGP@50: More than Four Decades of Jet Quenching
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Hydrodynamic Description of the Quark-Gluon Plasma
A review of how relativistic hydrodynamics has been used to discover and quantify the quark-gluon plasma in heavy-ion collisions.
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